#define _CRT_SECURE_NO_WARNINGS 1
bool lemonadeChange(int* bills, int billsSize) {
    int five = 0, ten = 0;
    for (int i = 0; i < billsSize; i++)
    {
        if (bills[i] == 5)
        {
            five++;
        }

        else if (bills[i] == 10)
        {
            if (five)
            {
                five--;
                ten++;
            }
            else
                return false;
        }

        else {
            if (five && ten)
            {
                five--;
                ten--;
            }
            else if (five >= 3)
            {
                five -= 3;
            }
            else
                return false;
        }

    }
    return true;
}